nadir
UK[ˈneɪ.dɪər]US[ˈneɪ.dɪər]
n
the point on the celestial sphere directly beneath an observer, opposite the zenith.
n
the lowest or most unsuccessful point in a situation.
Etymology
the term 'nadir' entered english in the late 14th century via medieval latin and old french, tracing its ultimate origin to arabic astronomical terminology. it derives from the arabic phrase 'naẓīr as-samt', literally translating to 'opposite the zenith', where 'naẓīr' means 'opposite' and 'as-samt' means 'the path' or 'the zenith'. in medieval astronomy, it was adopted to name the point in the sky directly opposite the highest point (the zenith), completing the celestial coordinate system. from this precise astronomical meaning, the word evolved metaphorically in english to signify the absolute lowest point in any situation, fortune, or hope.
Analysis
the word is a simplex loanword from arabic, borrowed as a whole unit. it originates from the arabic phrase 'نظير السمت' (naẓīr as-samt), meaning 'opposite to the zenith'.
Examples
the team's morale reached its nadir after a series of devastating losses.
in astronomy, the nadir is directly below the observer, while the zenith is directly above.
his career was at its nadir, but he was determined to rebuild it from the ground up.